SUNNYVALE, CALIF. — Silicon Storage Technology Inc. has added four devices to its 39-series multipurpose-flash product family. The 2-Mbit SST39SF020P and SST39VF-020P and the 4-Mbit SST39-SF040P and SST39VF040P flash parts are aimed at digital consumer, networking, wireless communications and Internet computing applications.

The 2-Mbit SST39SF020P and the 4-Mbit SST39SF040P use a single-voltage supply of 4.5 to 5.5 V for read, program and erase. Both operate over a 2.7- to 3.6-V range. Read access time is 45 and 55 nanoseconds, respectively, for the SST39SF020P/040P and 70 and 90 ns for the SST39VF020P/040P. Active current is 10 mA typical. Standby is 30 microamps for the SST39SF020P/040P and 1 microamps for the SST39VF-020P/040P.

Marketing manager Y.G. Han said the new parts offer user-selectable top or bottom 16-kbyte block protection, whereas most devices offer one block-protection mode, but not both. Besides reducing customer inventory costs, he said, the feature is useful to companies that want to protect important code or data permanently. With block protection enabled, the top or bottom 16-kbyte block is permanently write-protected.

The parts come in a 32-pin plastic dual in-line package, 32-pin plastic leadless chip carrier and 32-pin thin small-outline package (8 x 14 mm). In 1,000-piece quantities, the SST39SF020P/040P are $1.69 and $2.75, and the SST39VF-020P/040P are $1.56 and $2.64.

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EETInfo No. 608